F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use

F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output

F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant

Abstract

A turbocharger is provided including a turbine wheel and a compressor wheel attached to one another by a shaft. A thrust plate includes a plate body having an aperture there through and defining a plurality of circumferentially spaced pad regions that define a land region that is perpendicular to a rotational axis of the shaft. The plate body further defines a plurality of two stage slope regions adjacent to each of the land regions. The two stage slope regions include a steep slope portion and a gradual slope portion disposed between the steep slope portion and the land regions. The rotary assembly of the turbocharger includes a thrust surface that engages the pad regions. The two-stage slope regions provide improved loading capacity by the combination of better lubricant oil availability due to the steep slope region and optimized tribological performance due to the gradual slope region.

Description

Translated from Chinese

在油雾润滑状况下的2级斜坡止推轴承垫座设计 Thrust bearing pedestal design at level 2 under the slopes of oil mist lubrication only

技术领域 FIELD

[0001]当前公开内容涉及涡轮增压的内燃机，并且更特别地涉及用于改进润滑的改进止推轴承设计。 [0001] The present disclosure relates to internal combustion engine turbochargers, and more particularly to an improved lubrication thrust bearing for improving the design.

[0003]内燃机被用于在可靠的基础上在持续很久的时间段产生可观水平的动力。 [0003] the internal combustion engine is used to generate considerable power levels in a prolonged period of time on a reliable basis.许多这样的发动机组件采用增压装置(诸如废气涡轮机驱动的涡轮增压器)以在气流进入发动机的进气歧管之前压缩该气流从而增加动力和效率。 Many such components using the engine supercharging device (such as an exhaust gas turbine driven turbocharger) to compress the airflow before the airflow into the engine intake manifold and thereby increase the power efficiency.

[0004]具体地，涡轮增压器使用离心式气体压缩机，其与除此之外地利用环境大气压力可实现的相比，迫使更多的空气，并且因此迫使更多的氧气进入发动机的燃烧腔室。 [0004] Specifically, a turbocharger utilizing a centrifugal gas compressor, which is compared with the ambient atmospheric pressure that can be achieved in addition to use, forcing more air and thus forcing more oxygen into the combustion engine Chamber.被迫使进入发动机的含氧空气的附加质量改进发动机的容积效率，这允许其在给定的循环中燃烧更多的燃料，并且由此产生更多的动力。 Additional oxygen-containing forced air mass entering the engine is improved volumetric efficiency of the engine, which allows it to burn more fuel in a given cycle, and thus produce more power.

[0005]典型的涡轮增压机采用中心轴，该中心轴由一个或多个轴承支承并且在废气驱动的涡轮机叶轮和空气压缩机叶轮之间传送旋转运动。 [0005] Typical turbo machine central axis, the transfer rotational movement between the central shaft by a bearing and one or more exhaust gas driven turbine wheel and the compressor wheel air.涡轮机叶轮和压缩机叶轮都被固定到该轴，其与各种轴承组件组合构成涡轮增压器的旋转组件。 The turbine wheel and the compressor wheel are secured to the shaft, bearings which various components constituting the rotating assembly of the turbocharger.重要的是维持涡轮增压器止推轴承的润滑。 Important to maintain the turbocharger thrust bearing lubrication.实验结果显示由于在高速度下的大的离心力产生的上游的低润滑流动以及出口处的高流动在止推轴承空腔中引起油雾润滑状况。 Experimental results show that due to a high flow low lubricant flow in the large centrifugal forces generated at high speed and an outlet at the upstream of the mist cause the thrust bearing lubrication cavity.在当前的止推板的设计中在轴承空腔中的油雾润滑状况能够使得止推垫座缺油并且降低该止推轴承的负载能力。 In the current design of the thrust plate lubrication oil mist in the bearing cavity such that the thrust can be starved shoe and reduce the load capacity of the thrust bearing.

发明内容 SUMMARY

[0006]这个部分提供本公开内容的概括性总结，而不是其完整范围或其全部特征的详尽的公开内容。 [0006] This section provides a general summary of the disclosure, but instead its full scope or all of the detailed disclosure features.

[0007] —种涡轮增压器被提供，其包括通过轴附接到彼此的涡轮机叶轮和压缩机叶轮。 [0007] - species turbocharger is provided, which comprises a shaft attached to each other by the turbine wheel and the compressor wheel.止推板包括板主体，该板主体具有从其通过的孔(aperture)并且限定多个周向间隔的垫座区域，该垫座区域限定垂直于轴的旋转轴线的平台区域。 The thrust plate includes a plate body, the body having a plate aperture (Aperture) therethrough and defining a plurality of circumferentially spaced areas pedestal, the pedestal region defined landing area perpendicular to the axis of the rotary shaft.垫座区域进一步限定与平台区域的每一个相邻的多个二级斜坡区域。 Each of the plurality of sloping regions adjacent to two further defines a platform region and pedestal region.该二级斜坡区域包括陡坡部分以及被置于陡坡部分和平台区域之间的缓坡部分。 The region comprises two ramp portions and a steep slope disposed between the gentle slope portion and a steep slope portion of the platform region.涡轮增压器的旋转组件包括与平台区域接合的止推表面。 A turbocharger rotating assembly includes a thrust surface engaging the platform region.二级斜坡区域提供改进的负载能力是通过由于陡坡区域引起的更好的润滑油可用性以及由于缓坡区域引起的优化的摩擦性能的组合。 The two slopes provide improved load capacity region is better lubricants steep area availability, and combinations of friction caused by the optimized performance due to the ramp area caused due.

[0008]其它的适用性领域通过本文中提供的描述将变得明显。 [0008] Other areas of applicability of the description provided herein, will become apparent.在这个发明内容中的描述和具体示例仅意在用于说明的目的，而不意在限制当前公开内容的范围。 Description and specific examples in this summary are intended for purposes of illustration only, not intended to limit the scope of the instant disclosure.

附图说明 BRIEF DESCRIPTION

[0009]本文中描述的附图仅用于所选择实施例的说明目的，而不是用于所有可能的实施方式，并且没有意在限制当前公开内容的范围。 [0009] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible embodiments for the embodiment, and is not intended to limit the scope of the instant disclosure.

[0010]图1是根据当前公开内容的发动机组件的示意图解； [0010] FIG. 1 is a schematic view of an engine assembly according Solution current disclosure;

图2是在图1中显示的涡轮增压器的示意性的横截面图解； FIG 2 is a schematic cross-sectional illustration of the turbocharger shown in Figure 1;

图3是根据当前公开内容的原理的改进的止推板的止推垫座区域的平面图；以及图4a-4c是沿图3的直线4-4截取的具有替代的2级斜坡设计的垫座区域的横截面视图。 FIG 3 is a plan view of the thrust shoe region of the current principles of the disclosure of an improved thrust plate; and Figures 4a-4c in FIG. 3 is along line 4-4 with an alternative design of the second ramp level pedestal a cross-sectional view of the area.[0011 ]贯穿附图的一些视图，对应的附图标记指示对应的零件。 [0011] throughout the several views of the drawings, corresponding reference numerals indicate corresponding parts.

具体实施方式 detailed description

[0012]现在将参考附图更充分地描述示例实施例。 [0012] Reference will now be more fully described exemplary embodiment of FIG.

[0013]示例实施例被提供使得这个公开内容对于本领域技术人员来讲将是详尽的，并且将向本领域技术人员充分地传达该范围。 [0013] Example embodiments are provided so that this disclosure in terms of ordinary skill in the art will be thorough, skilled in the art and will fully convey the scope.许多具体细节被阐述，诸如具体组件、装置和方法的示例，以提供对当前公开内容的实施例的彻底理解。 Numerous specific details are set forth as examples of specific components, devices, and methods, to provide a thorough understanding of the current embodiment of the disclosure.对本领域技术人员将明显的是，具体细节不需要被采用，示例实施例可以以许多不同的形式体现，并且其也不应该被解释为限制本公开内容的范围。 Skilled in the art will be apparent that the specific details need not be employed, that example embodiments may be embodied in many different forms and should not be construed as limiting the scope of the disclosure.在一些示例实施例中，众所周知的工艺、众所周知的装置结构以及众所周知的技术没有被详细描述。 In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0014]本文中使用的术语仅是出于描述特定示例实施例的目的，而不意在限制。 [0014] The term used herein is for the purpose of describing particular example embodiments and is not intended to be limiting.如在本文中使用的，除非上下文中有其他清楚指示，单数形式“一个”、“一个”以及“该”也可以意为包括复数形式。 As used herein, unless the context clearly dictates other, the singular forms "a", "an" and "the" may be intended to include the plural forms.术语“包括”、“包括”、“包含”以及“具有”是包括性的并且因此具体说明了所陈述的特征、整体、步骤、操作、元件和/或部件的存在，而不排除一个或多个其他特征、整体、步骤、操作、元件、部件、和/或其群组的存在或附加。 The term "comprising", "includes", "including" and "having," are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude one or more other features, integers, steps, operations, elements, components, and / or additional or groups thereof.本文中描述的方法步骤、工艺以及操作不被解释为必要地需要它们的以所讨论或图示的特定顺序的执行，除非作为执行顺序被明确地确定。 The method steps described herein, and the process operation is not necessarily to be construed as they are needed to perform the particular order discussed or illustrated, unless specifically determined as the execution order.还要理解的是额外的或替代的步骤可以被采用。 Also to be understood that additional or alternative steps may be employed.

[0015]当元件或层被称为“在……上”、“接合到”、“连接到”或“联接到”其他元件或层时，其可以是直接地在其他元件或层上、接合、连接或联接到其他元件或层，或者可以存在介入元件或层。 [0015] When the element or layer is referred to as "on ......", "engaged to", "connected to" or "coupled to" another element or layer, it can be directly on the other element or layer, bonded connected or coupled to the other element or layer or intervening elements or layers may be present.相反，当元件被称为“直接地在其他元件或层上”、“直接地接合到”、“直接地连接至IJ”或“直接地联接到”其他元件或层时，可以没有介入元件或层存在。 In contrast, when an element is referred to as being "directly on another element or layer," "directly engaged to", "directly connected to IJ" or "directly coupled to" another element or layer, there may be no intervening elements or layer exists.用于描述元件之间的关系的其他词语应该以类似方式解释(例如，“在……之间”对“直接地在……之间”，“相邻”对“直接地相邻”等等)。 Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between ......" versus "directly between ......", "adjacent" versus "directly adjacent," etc. ).如在本文中使用的，术语“和/或”包括相关联的列举项目的一个或多个的任意和全部组合。 The term "and / or" includes any and all combinations as used herein, includes associated listed items to one or more.

[0016]发动机组件10在图1中被图示，并且可以包括发动机结构12，该发动机结构12限定多个气缸14以及与气缸14连通的进气和排气端口16，18。 [0016] The engine assembly 10 is illustrated in FIG. 1, and may include an engine structure 12, the structure 12 defining the engine intake and exhaust ports communicating with a plurality of cylinders 14 and 16, 18 and the cylinder 14.进气歧管20与进气端口连通并且排气歧管22与排气端口18连通。 The intake manifold 20 communicates with the air intake port and an exhaust manifold 22 communicating with the exhaust port 18.节流阀24和涡轮增压器26被设置在连接到进气歧管20的进气通道中，并且涡轮增压器26也与连接到排气歧管22的排气通道连通。 A throttle valve 24 and the turbocharger 26 is disposed at the intake manifold connected to the intake passage 20, and the turbocharger 26 is also communicated with an exhaust manifold connected to the exhaust passage 22.发动机组件10为了简单起见被图示为直列四缸布置。 For simplicity, engine assembly 10 is illustrated as an inline four cylinder arrangement.然而，要理解的是当前教导适用于任意数量的活塞气缸布置以及多种往复式发动机构造，其包括但不限于V型发动机、直列发动机和水平对置发动机，以及顶置凸轮和整体式凸轮构造。 However, it is to be understood that the present teachings are applicable to any number of piston-cylinder arrangement a reciprocating engine and a variety of configurations, including but not limited to a V-type engine, an inline engine and a horizontally opposed engine, and the overhead cam and cam configuration .

[0017]如图2中所示，涡轮增压器26包括具有第一端部30和第二端部32的轴28。 [0017] As shown in FIG., The turbocharger 226 includes a shaft having a first end portion 30 and a second end portion 32 is 28.涡轮机叶轮36被安装在轴28上靠近第一端部30，并且被构造成由从气缸14排出的燃烧废气旋转。 The turbine wheel 36 is mounted on shaft 28 near the first end portion 30, and is configured to be rotated by the combustion gas discharged from the cylinder 14.涡轮机叶轮36典型地由诸如镍络基“inconel”超级合金的耐高温且抗氧化材料形成，以可靠地抵挡燃烧废气的温度，其在一些发动机中可以接近2000华氏度。 Turbine impeller 36 is typically formed of a nickel-based network, such as "inconel" superalloys and high-temperature oxidation resistant material, in order to reliably withstand the temperature of combustion exhaust gas, which may approach 2000 degrees Fahrenheit in some engines.涡轮机叶轮36被置于包括蜗壳或蜗管40的涡轮机壳体38的内部。 Turbine impeller 36 is disposed inside tube 40 includes a scroll or volute of the turbine housing 38.蜗管40接收燃烧废气并且引导该废气到涡轮机叶轮36。 Scroll 40 receives the combustion gas and the exhaust gas guided to the turbine impeller 36.

[0018]进一步如图2中所示，涡轮增压器26还包括安装在轴28上靠近第二端部32的压缩机叶轮42。 [0018] As further shown in FIG turbocharger 226 further includes a compressor wheel 42 mounted near the second end portion 32 in the shaft 28.压缩机叶轮42被构造成加压从环境中接收的气流，用于最终传输到气缸14。 The compressor wheel 42 is configured to receive pressurized flow from the environment, for eventual transmission to the cylinder 14.压缩机叶轮42被置于包括蜗壳或蜗管46的压缩机盖44的内部。 The compressor wheel 42 is placed in a volute or scroll 46 comprises a compressor 44 inside the lid.蜗管46接收气流并且引导该气流到压缩机叶轮42。 Scroll 46 receives the air flow and directing the air flow to the compressor wheel 42.因此，通过燃烧废气提供能量到涡轮机叶轮36，旋转被传到轴28，并且进而被传递给压缩机叶轮42。 Thus, the energy provided by the combustion exhaust gas to the turbine wheel 36, the rotation is transmitted to shaft 28, and further is transmitted to the compressor wheel 42.

[0019] 继续参考图2，轴28经由轴颈轴承48支承用于旋转。 [0019] With continued reference to FIG. 2, the shaft 28 via a journal bearing 48 is supported for rotation.轴颈轴承48被安装在轴承箱52的孔(bore)50中，并且由加压发动机油源润滑和冷却。 Journal bearing 48 is mounted in the hole 52 of the bearing housing (bore) 50, and a source of pressurized oil to lubricate and cool the engine.轴承箱52包括止推壁54。 Box 52 includes a thrust bearing wall 54.轴颈轴承48被构造成控制轴28的径向运动和振动。 Journal bearing 48 is configured to control the radial movement of the shaft 28 and vibration.

[0020] 如图2中所示，涡轮增压器26还包括止推轴承组件56。 [0020] As shown in FIG turbocharger 226 further includes a thrust bearing assembly 56.止推轴承组件56包括止推环60和止推垫圈62。 Thrust bearing assembly 56 includes a thrust ring 60 and thrust washer 62.涡轮增压器26还包括止推板64，其通过止推保持器66被保持就位抵靠轴承壁54。 The turbocharger 26 further includes a thrust plate 64, thrust by the holder 66 is held in place against the bearing wall 54.

[0021]止推轴承组件56抵消在涡轮增压器26内发展的净推力，当这样的力正朝向压缩机叶轮42作用时。 [0021] The thrust bearing assembly 56 is offset by net thrust developed in the turbocharger 26, when such a force moving toward the compressor wheel 42 acting upon.如图所示，止推轴承组件56被定位在轴28上，在轴颈轴承48和压缩机叶轮42之间。 As shown, the thrust bearing assembly 56 is positioned on shaft 28, 42 between the journal bearing and the compressor wheel 48.该轴承组件56由经由栗(未显示)供应的加压发动机油源润滑和冷却。 The bearing assembly 56 by a via Li (not shown) source of pressurized lubricating and cooling engine oil supply.在涡轮增压器26运行期间，即当涡轮机叶轮36由燃烧废气提供能量时，止推垫圈62将由涡轮机叶轮发展的推力传送到止推板64。 During operation of the turbocharger 26, i.e. when the turbine wheel 36 powered by the combustion exhaust gases, the thrust washer 62 of thrust developed by the turbine wheel is transmitted to the thrust plate 64.尽管止推垫圈62被显示，但是应该理解的是替代的止推表面能够以其它方式形成在轴28上，诸如整体地形成或分离地形成的肩。 While the thrust washer 62 are shown, it should be understood that alternative thrust surface can be formed in other ways on the shaft 28, shoulder, or formed separately, such as integrally formed.

[0022]参考图3，止推板64被显示，其包括延伸通过其的用于容纳轴28的孔(aperture)70以及多个周向间隔的垫座区域71，该垫座区域71通过在轴28上的止推垫圈或其他止推表面被接合。 [0022] Referring to Figure 3, the thrust plate 64 is shown, which comprises a hole extending therethrough (aperture) 28 for receiving shaft 70 and a plurality of circumferentially spaced areas pedestal 71, the pedestal region 71 by thrust washers or thrust surfaces on the other shaft 28 is engaged.垫座区域71每一个包括大体垂直于轴28的旋转轴线的平台区域72。 Each comprises generally perpendicular to the rotational axis of the shaft 28 of the pedestal region of the plateau region 7172.多个二级斜坡区域74与平台区域72的每一个相邻。 72 adjacent to each of the plurality of secondary region 74 and the ramp platform region.二级斜坡区域74包括陡坡部分74A以及置于陡坡部分74A和平台区域72之间的缓坡部分74B。 Steep slope region 74 comprises two portions 74A and disposed between the ramp 72 and a steep slope portion 74A platform region portion 74B.图4a显示了根据当前公开内容的原理的止推板的垫座区域71以及二级斜坡区域的横截面视图。 Figure 4a shows a cross-sectional view of the pedestal region of the current thrust plate 71 the principles of the disclosure and the two regions according to a ramp.在图4a中，陡坡区域74A和缓坡区域74B被显示为两个大体平坦的表面，陡坡区域被设置成与缓坡区域74B的角度α2相比相对于平台区域72处于相对更大的角度αΐ处。 In Figure 4a, the steep ramp region 74A and the region 74B are shown as two generally planar surface, the region is steep as compared with the angle α2 arranged ramp region 74B with respect to the platform region 72 is at a relatively greater angle αΐ.如图4a中所示，在陡坡区域74Α和缓坡区域74Β之间的过渡部76能够是成角度的，或替代地，如图4b中所示，过渡部76'能够是弧形的或曲线的。 As shown in FIG. 4a, in the region of steep slopes and gentle 74Α region of the transition portion 76 between the 74Β can be angled, or alternatively, as shown in FIG. 4b, the transition portion 76 'can be curved or curvilinear .作为另外的替代，如图4c中所示，陡坡区域74A'和/或缓坡区域74B'能够是凸起的弧形表面，其中，弧形陡坡区域74A'的切线与弧形缓坡区域74B'的切线的角度α2'相比相对于垫座区域处于相对更大的角度αΓ处。 As a further alternative, as shown in, FIG steep region 74A 4c 'and / or the ramp region 74B' can be a convex curved surface, wherein the arcuate region of steep slope 74A of 'the arc tangent ramp region 74B' of tangent angle α2 'compared with respect to the shoe in a region at a relatively greater angle αΓ.

[0023]平台区域72和二级斜坡区域74被设计成使得陡坡区域74Α提供更大的面积以从空腔取得更多的润滑油，当该空腔处于油雾润滑状况下时其是特别有利的。 [0023] platform region 72 and the two ramp region 74 is designed such that the steep region 74Α provide a larger area for more oil from the cavity, when the cavity is in mist lubrication which is particularly advantageous of.同时，轴承负载能力通过缓坡区域74Β仍被优化。 Meanwhile, the load bearing capacity is still optimized by the gentle slope area 74Β.负载能力被显著地改进是通过由于陡坡区域74Α引起的更好的润滑油可用性以及由于缓坡区域74Β引起的优化的摩擦性能的组合。 Load capacity is significantly improved availability of the lubricant is better due to the steep slope region 74Α and by a combination of ramp region because due 74Β friction caused performance optimization.

[0024]实施例的上述描述已经出于说明和描述的目的被提供。 Objective [0024] The foregoing description of embodiments has been described for purposes of illustration and are provided.没有意在是穷举的或限制本公开内容。 It is not intended to be exhaustive or to limit the disclosure.特定实施例的单独的元件或特征一般不限于该特定实施例，而是在可应用的情况下是可互换的并且能够用在选择的实施例中，即使没有被具体显示或描述。 Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but are interchangeable and can be used in a selected embodiment, even if not specifically shown or described may be applied in the case.相同的事物也可以以许多方式变化。 The same thing can also be varied in many ways.这样的变型不被视为脱离本公开内容，并且所有这样的修改都意在被包括在本公开内容的范围内。 Such variations are not to be regarded as departing from the present disclosure, and all such modifications are intended to be included within the scope of the present disclosure.

Claims (9)

Translated from Chinese

1.一种涡轮增压器，包括:壳体；旋转组件，所述旋转组件包括通过轴附接到彼此的涡轮机和压缩机，所述旋转组件包括止推表面；止推板，所述止推板被置于壳体中用于与所述旋转组件的所述止推表面相对，所述止推板具有从其通过用于容纳所述轴的孔，并且限定多个周向间隔的垫座区域，所述垫座区域限定垂直于所述轴的旋转轴线的平台区域，所述垫座区域进一步限定与所述平台区域的每一个相邻的多个二级斜坡区域，所述二级斜坡区域包括陡坡区域以及置于所述陡坡区域和所述平台区域之间的缓坡区域。 A turbocharger, comprising: a housing; a rotating assembly, the rotating assembly includes a shaft attached to each other by a turbine and a compressor, said assembly comprising a rotating thrust surface; thrust plate, said stop the push plates are disposed in said housing for rotation with said assembly opposite thrust surface, said thrust plate having a through hole for receiving said shaft therefrom, and defining a plurality of circumferentially spaced pads seat region, said pedestal region is defined perpendicular to the axis of rotation of the platform region of the shaft, each of the plurality of sloping regions adjacent to two further define the region of the platform region seat cushion, the two steep slope region and a region comprising a region disposed between the steep ramp region and the platform region.

2.根据权利要求1所述的涡轮增压器，其中，所述陡坡区域和所述缓坡区域是大致平坦的。 The turbocharger according to claim 1, wherein the steep ramp region and the region is substantially planar.

3.根据权利要求1所述的涡轮增压器，其中，所述陡坡区域和所述缓坡区域是弧形的。 The turbocharger according to claim 1, wherein the steep ramp region and the region is curved.

4.根据权利要求1所述的涡轮增压器，其中，所述陡坡区域和所述缓坡区域的至少一个是大致平坦的。 The turbocharger according to claim 1, wherein the steep ramp region and the region of the at least one substantially flat.

5.根据权利要求1所述的涡轮增压器，其中，所述陡坡区域和所述缓坡区域的至少一个是弧形的。 The turbocharger according to claim 1, wherein the steep ramp region and the at least one region is arcuate.

6.根据权利要求4所述的涡轮增压器，其中，在所述陡坡区域和所述缓坡区域之间的过渡区域是成角度的。 The turbocharger according to claim 4, wherein, in the transition region between the region and the steep ramp is angled region.

7.根据权利要求4所述的涡轮增压器，其中，在所述陡坡区域和所述缓坡区域之间的过渡区域是弧形的。 The turbocharger according to claim 4, wherein, in the transition region between the region and the steep ramp is arcuate region.

8.根据权利要求5所述的涡轮增压器，其中，在所述陡坡区域和所述缓坡区域之间的过渡区域是成角度的。 The turbocharger according to claim 5, wherein, in the transition region between the region and the steep ramp is angled region.

9.根据权利要求5所述的涡轮增压器，其中，在所述陡坡区域和所述缓坡区域之间的过渡区域是弧形的。 9. A turbocharger according to claim 5, wherein, in the transition region between the region and the steep ramp is arcuate region.